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CONSOLIDATED STATEMENTS OF CASH FLOW (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Cash flows from operating activities: |  |  |
Net income | $ 184,045 | $ 163,995 | $ 161,752
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Amortization | 63,573 | 54,755 | 51,442
Depreciation | 15,373 | 12,392 | 12,639
Non-cash stock-based compensation | 15,865 | 11,194 | 6,845
Change in estimated acquisition earn-out payables | 1,418 | (2,206) | (1,674)
Deferred income taxes | 32,723 | 30,328 | 22,587
Income tax benefit from exercise of shares from the stock benefit plans | (8,659) | (916) | (11,391)
Net gain on sales of investments, fixed assets and customer accounts | (4,105) | (1,890) | (1,474)
Payments on acquisition earn-outs in excess of original estimated payables | (4,086) | (1,369) |
Changes in operating assets and liabilities, net of effect from acquisitions and divestitures: |  |  |
Restricted cash and investments (increase) decrease | (34,029) | (6,941) | 31,663
Premiums, commissions and fees receivable (increase) | (11,312) | (20,570) | (2,555)
Other assets decrease (increase) | 2,145 | (7,322) | 14,529
Premiums payable to insurance companies (decrease) increase | (4,651) | 9,447 | 436
Premium deposits and credits due customers increase (decrease) | 2,506 | 1,277 | (9,673)
Accounts payable increase (decrease) | 36,505 | (2,807) | 28,246
Accrued expenses and other liabilities (decrease) increase | (43,059) | 3,975 | (2,087)
Other liabilities (decrease) | (23,937) | (5,811) | (5,233)
Net cash provided by operating activities | 220,315 | 237,531 | 296,052
Cash flows from investing activities: |  |  |
Additions to fixed assets | (24,028) | (13,608) | (10,454)
Payments for businesses acquired, net of cash acquired | (425,054) | (166,055) | (157,637)
Proceeds from sales of fixed assets and customer accounts | 14,095 | 3,686 | 1,558
Purchases of investments | (11,167) | (12,698) | (9,285)
Proceeds from sales of investments | 10,654 | 12,950 | 9,327
Net cash used in investing activities | (435,500) | (175,725) | (166,491)
Cash flows from financing activities: |  |  |
Payments on acquisition earn-outs | (13,539) | (8,843) | (2,136)
Proceeds from long-term debt | 200,000 | 100,000 |
Payments on long-term debt | (1,227) | (102,072) | (19,425)
Borrowings on revolving credit facilities | 100,000 |  |
Payments on revolving credit facilities | (100,000) |  |
Income tax benefit from exercise of shares from the stock benefit plans | 8,659 | 916 | 11,391
Issuances of common stock for employee stock benefit plans | 13,305 | 8,667 | 11,119
Repurchase of stock benefit plan shares for employee to fund tax withholdings | (8,963) | (659) | (10,143)
Cash dividends paid | (49,534) | (46,494) | (44,496)
Net cash provided by (used in) financing activities | 148,701 | (48,485) | (53,690)
Net (decrease) increase in cash and cash equivalents | (66,484) | 13,321 | 75,871
Cash and cash equivalents at beginning of year | 286,305 | 272,984 | 197,113
Cash and cash equivalents at end of year | $ 219,821 | $ 286,305 | $ 272,984

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